Preparation of novel high performance recoverable and natural sunlight-driven nanocomposite photocatalyst of Fe3O4/C/TiO2/N-CQDs

Publication date: 15 November 2018Source: Materials Science in Semiconductor Processing, Volume 87Author(s): Ali Aghamali, Morteza Khosravi, Hamed Hamishehkar, Nasser Modirshahla, Mohammad A. BehnajadyAbstractThis work describes a sunlight-active photocatalyst capable of magnetically separating prepared by depositing various amounts of N-doped carbon quantum dots (N-CQDs) on the Fe3O4/C/TiO2 (FCT) nanocomposite. The photocatalytic activity of the resulting composites was investigated in the decolorization of methylene blue (MB), under UV, visible and sunlight irradiation. In the composites, the amorphous carbon interlayer is devised to prevent photodissolution of the Fe3O4 core. To coat the TiO2 nanoparticles on the insulated carbon surface of the magnetic core, a vapor phase hydrolysis method was used while a hydrothermal method was used to deposit N-CQDs on the Fe3O4/C/TiO2 nanocomposite surface. The prepared nanocomposites were characterized by photoluminescence (PL) spectroscopy, X-ray diffraction (XRD) analysis, transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray (EDX) spectroscopy, Fourier transform infrared (FT-IR) spectrometry, diffuse reflectance spectroscopy (DRS) and vibrating sample magnetometry (VSM). The results revealed that the N-CQDs content of the FCT composite has a great influence on the photocatalytic activity of the nanocomposite. So that, the photocatalyst FCT/N-CQDs−4.5 wt% resulted i...
Source: Materials Science in Semiconductor Processing - Category: Materials Science Source Type: research